PCI/IOV: Fix wrong kernel-doc identifier

Replace "-" to be ":" in comment section to be aligned with
kernel-doc format.

drivers/pci/iov.c:67: warning: Function parameter or member 'dev' not described in 'pci_iov_get_pf_drvdata'
drivers/pci/iov.c:67: warning: Function parameter or member 'pf_driver' not described in 'pci_iov_get_pf_drvdata'

Fixes: a7e9f240 ("PCI/IOV: Add pci_iov_get_pf_drvdata() to allow VF reaching the drvdata of a PF")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/8cecf7df45948a256dc56148cf9e87b2f2bb4198.1646652504.git.leonro@nvidia.com


Signed-off-by: Alex Williamson <alex.williamson@redhat.com>